package com.chencq.core.utils.beanutil;

import java.lang.reflect.Field;

import com.chencq.module.user.entity.User;

/**
 * @author Administrator
 *	反射工具
 */
public class ReflectHelper {
	
	public static Field [] getAllField(Object obj){
		Field [] field = obj.getClass().getDeclaredFields();
		return field;
	}
	
	/**
	 * 获取obj对象fieldName的Field
	 * @param obj
	 * @param fieldName
	 * @return
	 */
	public static Field getFieldByFieldName(Object obj, String fieldName) {
		for (Class<?> superClass = obj.getClass(); superClass != Object.class; superClass = superClass.getSuperclass()) {
			try {
				return superClass.getDeclaredField(fieldName);
			} catch (NoSuchFieldException e) {
			}
		}
		return null;
	}

	/**
	 * 获取obj对象fieldName的属性值
	 * @param obj
	 * @param fieldName
	 * @return
	 * @throws SecurityException
	 * @throws NoSuchFieldException
	 * @throws IllegalArgumentException
	 * @throws IllegalAccessException
	 */
	public static Object getValueByFieldName(Object obj, String fieldName)
			throws SecurityException, NoSuchFieldException,
			IllegalArgumentException, IllegalAccessException {
		Field field = getFieldByFieldName(obj, fieldName);
		Object value = null;
		if(field!=null){
			if (field.isAccessible()) {
				value = field.get(obj);
			} else {
				field.setAccessible(true);
				value = field.get(obj);
				field.setAccessible(false);
			}
		}
		return value;
	}

	/**
	 * 设置obj对象fieldName的属性值
	 * @param obj
	 * @param fieldName
	 * @param value
	 * @throws SecurityException
	 * @throws NoSuchFieldException
	 * @throws IllegalArgumentException
	 * @throws IllegalAccessException
	 */
	public static void setValueByFieldName(Object obj, String fieldName,
			Object value) throws SecurityException, NoSuchFieldException,
			IllegalArgumentException, IllegalAccessException {
		Field field = obj.getClass().getDeclaredField(fieldName);
		if (field.isAccessible()) {
			field.set(obj, value);
		} else {
			field.setAccessible(true);
			field.set(obj, value);
			field.setAccessible(false);
		}
	}
	
	public static void main(String[] args) {
		User user=new User();
		user.setUserId("2");
		user.setEmail("chenchaoqun@95190.com");
		user.setGender(1);
		Field [] field=getAllField(user);
		for (Field f:field) {
			try {
				System.out.println("字段名称:"+f.getName()+",值为:"+getValueByFieldName(user, f.getName()));
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
		
	}
}
